 He was at that time almost 59, and didn't find it necessary to hide his age.But for Mozart's early death on 5 December 1791, he would have taken Haydn's place in Salomon's concerts in 1794.Haydn, still in London a year later when the news of Mozart's death reached him, was distraught; he wrote to their mutual friend Michael Puchberg, "For some time I was quite beside myself over his death, and could not believe that Providence should so quickly have called away an irreplaceable man into the next world".